Safety clamp for diamond-drill rods



June 12, 1923. 1,458,906

N. w. MORISETTE SAFETY CLAMP FOR DIAMOND DRILL RODS Filed Auz- 5, 1922 3 Sheets-Sheet 1 INUENT Q T & NnFuLEmLLMlfism:

N. w. MORISETTE SAFETY CLAMP FOR DIAMOND DRILL RODS June 12, 1923. 1,458,906

Filed Auz. 5, 1922 5 Sheets-Sheet 2 lmucmm June 12, 1923.

N. MORISETTE I SAFETY CLAMP FOR DIAMOND DRILL RODS s Shets-Sheer, :5

Filed Auz. s, 1922 .INUENTDR NHFDLEflN-M.MDRIEETFE.

Patented June 12, 1923. r r i i r NA OLE NWI FB D MonIsE'r'rn, or COLEMAN TOWNSH P, 'on'ranto, oANAn m; V

SAFETY CLAMP m D AMONDQDRI L ants? llpplication filed August 3, 1922. Se1'ia1 No -57E L449. j

To all whom it may'con-ce-m:

Beait known thatI, NAPoLnoN VVILI RE D Momsnrrn, a subject of'the King-of Great Britain, and a resident of the township of Coleman, in the Provinceof Ontario and Dominion ofCa-nada, have invented certain new and useful Improvements in Safety the following is a specification.

' This" invention relates to a machine to be used in lowering and hoisting diamond drill rods' into holes. The object of the in- Clamp for Diamond- Drill Rods, 'of which vention is to provide an automatic tool which in the operation of raising the rods from the hole, or into an upper hole will allow the rods to be hoisted, butwhich by the use of bevelled jaws, will automatically gripand hold them from sliding into the hole in down'holes or' from sliding out of upper holes. The machine thus takes the place of the hand or foot operated clamps -or tongs at present used in hoistingdrilling rods. I

In drilling a diamond. drill hole it is neces sary for the recovery ofthe core and for changing the cutting bit, to raise the jrods from the hole. This operation may be news sary'several times a day during the drilling. I; H H

raisingof thefrod; taking'hold-ot the. again each time as the, hoisting-.tensionis 1 released. Th'e invention removes thev chances "of injury tothe operator and eliminates the i The raising is done by attaching a hoisting cable or other puller to the end of the rod, projecting from "the hole and raising the complete rod. This rodismade up of-short lengths. When the second length projects from the hole and the limit of the hoisting space is reached the second length is gripped in the old style by the hand or foot operated clamps 'or tongs, which thisqmachine now replaces. The hoistingcable is slaeked off, the first length of rod disconnected, the

hoisting cableattached to thesecond length of 'rod'and the'rod again hoisted. The clamps or'ton'gs prevent the rods from slidi'ng back-into the hole, while thehoisting cable is being detached from the first length and attached to the second. The hoisting operation is repeated one length'of'rod at a time, until the whole rod is removed from the hole. In a hole 500 -feet long, using 10 foot lengths, the hoisting operation, the disconnecting fro one length of rod and the connecting of the hoisting cable on to the next length would thus be 'repeate'd' fifty times, the tongs coming intouseeach time to hold the rods from sliding back into the hole during the disconnecting. These tongsbein'g hand operated require to" be clamped ,stop and hold the by hand tothe rod and' held clampedfby" I I I clip. The tongs coming againstfthe pipe casing ofIthe' hole' prevent therod n-pms lipping. The clip has to be released and: the ,6 tongsainclainped by hand before hoisting Both of the hand operations presentelem ents i ii i of danger, as'in clamping the clip mayslip i or thc tongs 'nottake positive hold, ing'either 1 i i V of which cases the rods mayjdrop 'into the hole, damaging tliediamonds the bit and causing delay infishing' the: rods from theif-"i,

holel Or in-unclampin'g the t0ngs thehoist ing apparatus'may be started, before the- This.- invention, 'which} replaces, these clamps or (tongs, I dangers. The jaws' o-f thismachine "withe 1 specially cut teeth, come; into a'c'tiorrf thelinstant the upward pullonthe rodsiis slacke d The pp Q 0. 3. ispositiveffl and the heav er the 'd'ownwa'rd pull on the rods, the tighter the holdfthe jaws tak io it. WVhen hoisting is again resumedthe jaws automaticallyreleasetheir hold with the first upward pull and allow the fi'irther" risk 'ofthe rods and.diamond bit slidiiig'back into the holeand causingd m g' 'and de a a no I v I It alsoi proves agreat SELV BIIIIOVfkralugbjefi drilling time, easily savin W n third ,n v.

of the time 10f hoisting'rodsi The invention is also used in lowering rodsv "into the hole. V, ,In! this loweringflsrnooth 1 jawswithout teethare used jThese, jaws,g;- controlled by a-handj lever"maniplulatedfbyf one hand, allow the rods to slipiat anyrequired' speed i into the hole, instantly is'being screwed'jon. 'VVith the above and other objects "in View. 1 the invention consists essentially ofthe con i struction hereinafter described and set forth v in the following specification's andaccorn 10 5 in v panying drawings'forming part ofthejs'am'e. Thedevice is for use-with size di m' I drill rods For'larger'jor smallersizediiro ds, I I pipes, etc to be held by this inve''ntion proportion'a tely larger or. smaller sized jaws 1 and holders would be constructed on f I same. principle as .here illustrated;-

gets rid ,of both {of these f;

.rod whilthe an n ga I In the drawings:

Figure 1 is a side elevation of an embodiment of the invention.

Figure 2 is an elevation at right angles to Figure 1.

Figure 3 is a sectional elevation.

Figure 4 is a section on the line 4- 1, of Figure 1.

Figure 5 is a section on the line 5-5, Figure 1. j

Figure 6 is a sectional elevation of a modification of the device used for lowering the drill rod.

Figure 7 Figure 2.

Figure 8 is a section on the line 88, Figure 2.

Figure 9 is a perspective view'of the clamping jaws.

In the drawings, like characters of reference indicate corresponding parts in all the figures.

Referring tothe drawings, A is a box shaped casing conveniently in the form of an iron casing having a central opening 10 is a section on the line 7-7,

through which the drill rod is designed to extend, the latter at one end being formed with a constricted neck 11 internally screw threaded and designed to connect with the screw threaded top of the pipe casing B of the diamond drill rod C whereby the casing is firmly supported in position on the top of the rod. The casing A above the neck 11 is rectangular in section. The opposite sides 12 and 13 of the casing are machined to a bevel of about an inch and a quarter to one foot and designed to receive the clamping jaws D and E which are provided on the outer side with a corresponding bevel nd on the inner side are either formed with ratchet teeth when the device is used during raising of the drill rod or smooth when used in lowering the drill rod as shown in Figure 6. In Figures 1 to 5 and'9 the jaws are shown with ratchet teeth 14; on the inner side, theteeth being cut to suitable angles such as angles of 45 degrees and 27 degrees, the sharper angle being on the holdingside. The jaws are further curved on the inner side to suit the curvature of the drill rod. The outward movement of the jaws is designed tobe' limited by suitable means such as by a fork pin F of steel or the like which extends through suitable perforat-ions in the casing A and is designed to abut the shoulders 15 formed on the jaws D and E, by which the outward movement of the jaws is limited. When the shoulder 15 abuts the fork pin Fthe rod C will be loosed from the clamp and may be freely withdrawn and this is the position whilethe rod is being pulled upwardly. hen, however, the pull on the rod is slaclrened, the jaws D and E will drop and the bevel on the casingv will cause them to move inwardly and to firmly grip the rod and prevent itfrom slipping into the casing pipe B.

To enable the jaws D and E to be readily removed should they become stuck in holding position, recesses or holes 16 are bored in them towards the outer end and in which a suitable tool may be inserted to withdraw them.

When the device is to be used for lowering the rod, the toothless jaws D and E are used, in the form shown in Figure 6. These jaws being provided with smooth curved inner faces 17 which fit closely to the drill rod G and with bevelled outer faces 18 which fit the bevels 12 and 13 on the casing. The jaws in this instance arenot automatic in their action and suitable clamping means are provided on the casing by which they may be tightened in position, i

these means comprising a cam 19 formed on a cross shaft 20 journaled in lugs 21 on the casing, the shaft being designed to be turned by suitable means such as a lever handle 23 which may have detachable engagement:

with the hexagonal or squared end 24; of the.

shaft 20. It may also be noted that the cam 19 may be used if desired to give additional gripping action to the toothed jaws D and E. hen used. with the smoothv jaws D and E the pressure of the cam will produce sufficient friction either to hold the rod C in place or allow it to lower through the clamp at any required speed.

From the foregoing, it will be seen that I i have invented av safety clamp for diamond Clllll rods etc. which is easily constructed and securely fastened to the ordinary pipe casmg and Wlll occupy a minimum space and when in position may be readily brought into and out of operation. In the hoisting operation, the hold on the rod, is automatic, whereas in lowering the rod the pressure may readily be pplied by operation of the lever 23.

As many changes could be made 1n the the scope of the claims, constructed without ment of the said jaws, the said means comprising a spring fork extending transverseabove construction and many widely different embodiments of my invention within departing from the spirit or scope thereof, it

ly through the casing and shoulders on the jaws designed to engage the fork.

2. A clamp of the character described comprising a casing having a threaded neck designed to en age the top of the casing of a. diamond dri 1 rod, the diamond drill rod being designed to pass through the casing, bevel faces formed on the inner side of the casing, pair of bevel jaws mounted inthe casing and designed to grip the drill rod, a spring fork extending transversely through the casing, shoulders on the jaws designed to engage the fork, and cam means designed to force the jaws against the rod.

3. A clamp of the character described comprising a casing having a threaded neck designed to engage the top of thecasing of a diamond drill rod, the diamond drill rod be-, ing designed to pass through the casing,

bevel faces formed on the inner side of the casing, a pair of bevel jaws mounted in the spring fork extending transversely through the casing, shoulders on the jaws designed to engage the fork a cross shaft in the casing, a cam on the cross shaft, and a lever handle connected to the shaft designed to force the jaws against the rod.

In Witness whereof I have hereunto set my hand in the presence of two witnesses. NAPOLEON WILFRED' MORISETTE.

Witnesses: a

JOHN GOODALL DICKENSON,

ANoUs DANIEL CAMPBELL, 

